Navigation Links
Molecular snapshots of oxygen formation in photosynthesis
Date:7/11/2014

states of the reaction. This stabilization is thought to be caused by a previously reported loss of a proton and to reflect a highly ordered arrangement that is required for the fast and energy efficient formation of oxygen from water."

The result was obtained using oxygen isotopic labelling and time-resolved membrane inlet mass spectrometry.

In the second study, Johannes Messinger and his collaborators used a X-ray free electron laser, Linac Coherent Light Source (Menlo Park, USA), that produces ultra-short high-intensity x-ray pulses (10−15 of a second) to perform simultaneous x-ray crystallography and x-ray emission spectroscopy on suspensions of micrometer sized photosystem II crystals.

"With this technique we studied the same reaction sequence and we obtained 'snap shots' of the structure of the atoms for the different states of the cluster, including the short lived state investigated in the first study."

The data show that no large scale structural changes (> 0.510−10 m) occur in the Mn4Ca cluster and the rest of the photosystem II complex during oxygen formation. The simultaneously collected X-ray emission data confirm that the "arresting" of the two bound water molecules, as observed in the mass spectrometric experiments, is not due to a change in the charge (oxidation state) of the manganese ions of the Mn4Ca cluster, nor to the formation of a first bond between the oxygen atoms of the two water molecules.

"The study suggests that small structural changes occur together with the proton release, but we still need to further improve the resolution of our data to see exactly what happens."

The first study was performed in collaboration with two French researchers. The second study was performed within an international team of more than 40 researchers.


'/>"/>

Contact: Johannes Messinger
Johannes.Messinger@umu.se
46-090-786-5933
Umea University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Evolution depends on rare chance events, molecular time travel experiments show
2. Scripps Research Institute scientists reveal molecular yin-yang of blood vessel growth
3. Alcohol abuse damage in neurones at a molecular scale identified for first time
4. Molecular scaffold could hold key to new dementia treatments
5. Oncologists: How to talk with your pathologist about cancer molecular testing
6. René Ketting of the Institute of Molecular Biology elected to EMBO membership
7. Molecular regulation of hypoxic-ischemic brain damage
8. Molecular switches age-related memory decline? Genetic variant protect against brain aging
9. Molecular tumor board helps in advanced cancer cases
10. Researchers find the accelerator for molecular machines
11. Scripps Florida scientists reveal molecular secrets behind resveratrols health benefits
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/25/2015)... SYDNEY , May 25, 2015  Australia,s market ... inception stage, although 2014 saw the advent of several ... on 24 April 2015 is expected to ignite interest ... devices in Australia . This in ... the industry and drive new partnerships amongst vendors and ...
(Date:5/21/2015)... , May 21, 2015 ... Imaging Market by Solutions (Hardware, Software, Services), by Applications ... & others), by End-Users (Military & Defense & ... MarketsandMarkets, Thermal Imaging Market is expected to grow ... by 2020, at a Compound Annual Growth Rate ...
(Date:5/20/2015)... , May 20, 2015 NXT-ID, Inc. ... that its wholly owned subsidiary, 3D-ID LLC, a company ... Team Battelle for the biometrics technology portion of the ... Contract from the Department of the Army. ... products developed for government, law enforcement and security agencies. ...
Breaking Biology News(10 mins):Australian wearables market to grow at CAGR of 78%; revenue of A$1 billion by 2018, says Frost & Sullivan 2Australian wearables market to grow at CAGR of 78%; revenue of A$1 billion by 2018, says Frost & Sullivan 3Australian wearables market to grow at CAGR of 78%; revenue of A$1 billion by 2018, says Frost & Sullivan 4Thermal Imaging Market Worth $9,998.9 Million by 2020 2Thermal Imaging Market Worth $9,998.9 Million by 2020 3Thermal Imaging Market Worth $9,998.9 Million by 2020 4NXT-ID, Inc Announces Participation as Member of Team Battelle for TIES Contract Award 2NXT-ID, Inc Announces Participation as Member of Team Battelle for TIES Contract Award 3
... due to predators, particularly in fragmented forest areas, but why? ... predator to find an answer. , "Rat snakes ... said U of I researcher Patrick Weatherhead. "Our hypothesis ... the edges of the forest, that,s where bird nests should ...
... being spewed into the Gulf of Mexico from the Deepwater ... the leak. However, in the cleanup efforts to come, "extreme ... bad situation even worse, says a leading bioremediation expert with ... of detergents and other chemicals used to clean up sites ...
... the University of Granada (UGR) have studied the natural history ... of Polygala balansae in Europe, a thorny bush ... previously thought to be exclusive to Morocco. The team of ... on the list of threatened species. In 2006, a ...
Cached Biology News:Fragmented forests result in more snakes, fewer birds 2Fragmented forests result in more snakes, fewer birds 3Caution required for Gulf oil spill clean-up 2Polygala balansae, a new bush to Europe, at risk of extinction in Spain 2
(Date:5/28/2015)... Research and Markets( http://www.researchandmarkets.com/research/6cg3zw/cell_therapy ) has ... "Cell Therapy - Technologies, Markets and Companies" ... describes and evaluates cell therapy technologies and methods, ... role in the practice of medicine. Hematopoietic stem ... marrow transplants. Role of cells in drug discovery ...
(Date:5/28/2015)... LAWRENCEVILLE, N.J. , May 28, 2015 ... announced that it has received commitments from two institutional ... million of the Company,s common stock in an at-the-market ... warrants to purchase common stock. The Company ... pursuant to which the Company agreed to sell an ...
(Date:5/28/2015)... BioNorth Texas (BioNorthTX), an independent, ... life sciences industry in northern region of Texas, ... The Foundry in Dallas on April 27, 2015. ... a broad spectrum of biotech professionals from the ... successes in partnering with key life sciences organizations ...
(Date:5/28/2015)... 2015 Biscayne Pharmaceuticals, Inc ., today ... growth hormone-releasing hormone (GHRH) technology will be discussed in a ... Meeting. The data show that the family of receptors ... is present on many primary breast cancer cells regardless ... antagonists could have broad anti-cancer potential in breast cancer. ...
Breaking Biology Technology:Global Cell Therapy Market 2015-2020 - Technologies, Markets and Companies 2Celsion Corporation Announces $8 Million At-The-Market Registered Direct Offering 2Celsion Corporation Announces $8 Million At-The-Market Registered Direct Offering 3BioNorthTX Holds Inaugural Board of Directors Meeting 2BioNorthTX Holds Inaugural Board of Directors Meeting 3Data Presented At 2015 ASCO Annual Meeting Shows Biscayne Pharmaceuticals' GHRH Antagonist Target Is Expressed Across All Breast Cancer Subtypes 2Data Presented At 2015 ASCO Annual Meeting Shows Biscayne Pharmaceuticals' GHRH Antagonist Target Is Expressed Across All Breast Cancer Subtypes 3
... YORK, April 5, 2011 Sangamo BioSciences, ... Inc. have announced a collaboration to develop a novel ... zinc finger DNA-binding protein (ZFP) technology. The ZFP therapeutic ... an inherited neurodegenerative disease for which there are currently ...
... 2011 The European Commission (EC) has approved, under the ... DuPont Denmark Holding ApS to acquire all of the outstanding ... cash per share. DuPont Denmark Holding ApS is a wholly ... "We are pleased to have achieved one of the ...
... CHAMPAIGN, Ill. With the first observation of thermoelectric ... that graphene transistors have a nanoscale cooling effect that ... engineering professor William King and electrical and computer engineering ... in the April 3 advance online edition of the ...
Cached Biology Technology:Sangamo BioSciences and CHDI Foundation Announce Collaboration to Develop ZFP Therapeutic® for Huntington's Disease 2Sangamo BioSciences and CHDI Foundation Announce Collaboration to Develop ZFP Therapeutic® for Huntington's Disease 3Sangamo BioSciences and CHDI Foundation Announce Collaboration to Develop ZFP Therapeutic® for Huntington's Disease 4European Commission Approves DuPont Tender Offer to Acquire Danisco 2European Commission Approves DuPont Tender Offer to Acquire Danisco 3Self-cooling observed in graphene electronics 2
Request Info...
Human RUNX2/CBFA1 MAb (Clone 232902)...
Lipid-rich bovine serum albumin for cell culture (1). It is chromatographically purified and has an IgG content 0.1% (w/w)....
normal rat IgM AF647...
Biology Products: